Can anybody with Quickload tell me....?

I don't have quick load, but I did do some shooting with a .300, and 4350 was what it seemed to prefer for accuracy if not for speed. Your load will give you between 2900 and 3000 fps allowing for the usual quirks that cause rifles that look the same to produce different velocities with the same load. The rifle I used was on the slow side of the scale, and I would get 2900 with that load.
 
Generated using Quickload 3.2.. a little old, but works for me. Your mileage may vary.

-- snip --
**** Input data: Date: 24-Sep-2009 Time: 23:35:18
Cartridge................. = .300 Win. Mag.(@)
Projectile type........... = .308, 180, Nosler BalTip 39583 with boattail

Max.avg.pressure(Piezo CIP)= 4300 bar Shot start / init pressure = 250 bar
Projectile weight (g)= 11.66 Groove caliber (mm)= 7.82
Length of cartridge (mm)= 84.84 Length of case (mm)= 66.55
Case capacity (cu.cm)= 5.94 Length of projectile (mm)= 34.14
Length of barrel (mm)= 609.6
**** Values calculated:
Seating depth (mm)= 15.85 Volume displaced (cu.cm)= 0.75
Comb.chamber volume (cu.cm)= 5.2 Projectile travel (cm)= 55.89
**** Input data:
Propellant type........... = IMR 4350
Charge weight...........(g)= 4.406 Load density......(g/cu.cm)= 0.848
Heat of Explosion (kJ/kg)= 3900 Ratio of spec. heats cp/cv = 1.243
Solid density (g/cu.cm)= 1.59 Weighting factor...........= 0.50
Burning rate factor Ba(1/s)= 0.474 Pro-/degressivity factor a = 0.43
Burning limit ......... z1 = 0.4 Combust.Chamber Vb(m³)= 5.195341E-6
Factor.................. b = 1.4 X-S.Area of Bore A(m²)= 4.732E-5
Bulk density (g/cu.cm)= 0.881 Projectile mass mp(kg)= 1.16638E-2
Loading ratio (%)= 96.3 Projectile travel x(m)= 5.589016E-1

**** Results calculated:
Maximum pressure ........ = 3907 bar Way of projectile at Pmax = 53.8 mm
Muzzle velocity ......Ve = 887 m/s Muzzle pressure .......Pe = 806 bar
Project. energy at muzzle = 4593 J Fraction of powder burnt = 98 %
Projectile travel time from 10% Pmax to muzzle = 1.2 ms

WARNING: Near Maximum Average Pressure - tolerances can cause dangerous pressures !
Real maximum of pressure inside barrel.
End of combustion after the projectile passes muzzle.

Table of progress of computed firing process:

NR.: x(mm) z (%) v (m/s) p (bar) t (ms)
-------------------------------------------------------------------------------
0 0.00 1.45 0.0 250.0 0.0000
1 0.00 1.48 0.3 256.2 0.0013
2 0.00 1.52 0.5 262.5 0.0048
3 0.00 1.59 1.0 274.9 0.0090
4 0.01 1.65 1.4 284.3 0.0142
5 0.02 1.74 2.0 299.8 0.0204
6 0.04 1.85 2.8 318.4 0.0275
7 0.06 1.97 3.7 340.0 0.0354
8 0.10 2.12 4.7 364.7 0.0440
9 0.15 2.29 5.9 393.8 0.0534
10 0.22 2.49 7.4 428.1 0.0634
11 0.30 2.73 9.0 466.8 0.0740
12 0.41 2.99 10.8 510.5 0.0851
13 0.55 3.29 12.9 559.8 0.0967
14 0.72 3.63 15.3 616.0 0.1086
15 0.92 4.02 18.0 678.2 0.1209
16 1.17 4.45 21.1 747.8 0.1334
17 1.46 4.95 24.5 825.0 0.1462
18 1.80 5.50 28.4 909.9 0.1591
19 2.20 6.11 32.7 1002.8 0.1723
20 2.67 6.80 37.4 1104.0 0.1855
21 3.20 7.55 42.7 1213.2 0.1987
22 3.81 8.39 48.5 1330.4 0.2121
23 4.50 9.31 54.9 1455.4 0.2255
24 5.28 10.32 61.9 1587.6 0.2388
25 6.16 11.42 69.5 1726.4 0.2522
26 7.14 12.62 77.7 1870.8 0.2656
27 8.24 13.91 86.6 2019.9 0.2790
28 9.46 15.31 96.2 2172.6 0.2923
29 10.81 16.82 106.5 2327.5 0.3056
30 12.30 18.43 117.4 2482.9 0.3189
31 13.94 20.15 129.1 2637.7 0.3322
32 15.74 21.98 141.5 2790.1 0.3455
33 17.70 23.92 154.5 2938.4 0.3588
34 19.84 25.96 168.3 3081.7 0.3721
35 22.18 28.11 182.6 3217.8 0.3854
36 24.71 30.37 197.6 3345.8 0.3987
37 27.45 32.72 213.2 3464.2 0.4120
38 30.42 35.18 229.4 3572.4 0.4254
39 33.62 37.73 246.2 3669.2 0.4389
40 37.07 40.37 263.4 3754.2 0.4524
41 39.81 42.39 276.6 3809.9 0.4626
42 44.06 45.24 295.3 3863.5 0.4774
43 48.52 48.01 314.0 3895.3 0.4921
44 50.83 49.37 323.3 3903.6 0.4993
45 52.01 50.04 328.0 3905.9 0.5030
46 53.21 50.71 332.7 3907.1 0.5066
47 53.51 50.88 333.9 3907.2 0.5075
48 53.66 50.96 334.4 3907.2 0.5079
49 53.74 51.00 334.7 3907.3 0.5082
50 53.81 51.04 335.0 3907.3 0.5084
51 53.89 51.08 335.3 3907.3 0.5086
52 58.88 53.70 354.0 3898.3 0.5231
53 64.15 56.25 372.7 3872.9 0.5376
54 69.73 58.72 391.4 3832.7 0.5522
55 75.65 61.12 410.1 3778.9 0.5670
56 81.93 63.45 428.8 3713.1 0.5820
57 88.61 65.71 447.5 3636.5 0.5972
58 95.72 67.90 466.2 3550.3 0.6128
59 103.31 70.01 484.9 3455.7 0.6287
60 111.41 72.05 503.6 3353.8 0.6451
61 120.09 74.02 522.3 3245.7 0.6620
62 129.38 75.92 541.0 3132.3 0.6795
63 139.35 77.75 559.7 3014.5 0.6976
64 150.06 79.50 578.4 2893.2 0.7164
65 161.60 81.18 597.1 2769.3 0.7361
66 174.05 82.79 615.8 2643.5 0.7566
67 187.50 84.33 634.5 2516.5 0.7781
68 202.07 85.80 653.2 2389.0 0.8007
69 217.86 87.19 671.9 2261.7 0.8246
70 235.04 88.51 690.6 2135.1 0.8498
71 253.74 89.76 709.3 2009.7 0.8765
72 274.16 90.94 728.0 1886.1 0.9049
73 296.51 92.05 746.7 1764.8 0.9352
74 321.02 93.08 765.4 1646.0 0.9677
75 347.99 94.04 784.1 1530.2 1.0025
76 377.72 94.93 802.8 1417.8 1.0399
77 410.61 95.75 821.5 1309.1 1.0804
78 447.11 96.50 840.2 1204.2 1.1243
79 487.72 97.17 858.9 1103.5 1.1722
80 533.10 97.77 877.6 1007.1 1.2244
81 557.79 98.05 887.0 960.6 1.2524
82 558.58 98.05 887.3 959.2 1.2533
83 558.78 98.06 887.3 958.8 1.2535
84 558.88 98.06 887.4 958.6 1.2536
85 558.91 98.06 887.4 958.6 1.2537

Muzzle exit

-- snip --
 
Using Sierra 180grn Bullets and depending on which bullet you choose you should be around the following:

.308, 180, Sierra SPRN 2170 - 2946
.308, 180, Sierra SPBT 2160 - 2987
.308, 180, Sierra SP 2150 - 2988
.308, 180, Sierra HP MatchK 2220 - 2995

These are based on a 28" Barrel.
 
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